Geomagnetic medium latitude pulsation, not detected by
IRF of Kiruna (http://www.irf.se/maggraphs/puls.php).
The signal is barely visible in the red ovals of Z component, but
very very weak.
2015-01-08 00:20 to 07:45 at OpenLab st. 04 - Sogliano al
Rubicone(FC), N ItalyStrong
and clear geomagnetic pulsation detected with induction coil,
inside the red ovals. Schumann resonances marked in left side.

2015-01-08 00:20 to 08:00 at OpenLab
st. 03 - ETNA RADIO OBSERVATORY From NICOLOSI
(CT), Etna Park, Sicily, S Italy
The location of Sicily is positioned most southern of the other
two, and at very low frequencies it is less sensitive.
The signal is in fact weaker and partly interfered from some
signs of local origin.